CVE-2018-1091
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and…
Does this matter?
Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own.
Description
In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-391, CWE-119
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Vendor Advisory
- http://openwall.com/lists/oss-security/2018/03/27/4Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1318
- https://access.redhat.com/security/cve/cve-2018-1091Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1558149Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Third Party Advisory
- https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2Patch, Third Party Advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Patch, Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Vendor Advisory
- http://openwall.com/lists/oss-security/2018/03/27/4Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1318
- https://access.redhat.com/security/cve/cve-2018-1091Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1558149Issue Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Third Party Advisory
- https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2Patch, Third Party Advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.